She switched on the bedside lamp.

她打开了床头灯。

《柯林斯英汉双解大词典》

A single red LED shows that the power is switched on.

单支红色发光二极管表示电源已接通。

《牛津词典》

The block becomes magnetic when the current is switched on.

一通上电流，这块板就会有磁性。

《牛津词典》

Specter's announcement was welcomed by White House spokesman Robert Gibbs, who said Specter's support would be important in implementing President Obama's economic plan: "Let me repeat what the president told Senator Specter this morning, that he has the president's full support, that he is thrilled that he switched parties and is a Democrat and that we look forward to working as we have on the Recovery and Reinvestment Plan with Senator Specter,"

VOA: standard.2009.04.28

Well, imagine if that change in structure could be switched on and off by addition of a phosphorous; and in fact it can in many proteins.

那么,想象一下,只需引入磷酸基团,就能导致蛋白质的结构发生变化,事实上很多蛋白质就是如此

耶鲁公开课 - 生物医学工程探索课程节选

There are 100 of these molecules, when a receptor gets activated a kinase activity gets activated, the kinase acts on the protein, the protein gets switched on, something new starts to happen inside the cell.

有一百个这样的分子,当受体被激活,激酶被激活后,激酶作用于蛋白,使蛋白活化,细胞中就会发生一些新变化

耶鲁公开课 - 生物医学工程探索课程节选

Each week Ross Rubin contributes Switched On, a column about consumer technology.

ENGADGET

Brittany has switched on to its own television channel, thanks to Welsh helping hands.

BBC: Brittany joins Celtic TV first

We switched on the radio, and heard dreadful stories of suffering and tragic loss.

FORBES: Move up http://i.forbesimg.com t Move down